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Self-calibration analyzer design method and device

A design method and self-calibration technology, applied in the field of spectrum analyzers, which can solve problems such as application limitations

Inactive Publication Date: 2015-06-17
CHINA UNIV OF PETROLEUM (EAST CHINA)
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The application of this type of analytical instrument is limited

Method used

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  • Self-calibration analyzer design method and device
  • Self-calibration analyzer design method and device

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Embodiment Construction

[0042] In order to solve the above-mentioned problem of measuring trace target analytes in the process gas under different background gas states, the implementation of this patent can add target analytes of known concentration to the current sampling gas to generate a composite reference gas, using the composite reference The gas pair analyzer is self-calibrated in real time, and the composite reference gas is further compared with the spectrum of the real-time process sample gas to calculate the concentration of trace target analytes in the process sample gas. The physical implementation of this patent has several advantages. Implementation of this patent ensures that the accuracy of the analyzer is not affected by changes in the background state. For example, when measuring the concentration of one or more trace analytes, its background components are complex and dynamic, and the absorption lines of the background components may overlap with the absorption lines of the targe...

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Abstract

The invention relates to a self-calibration analyzer design method and device, wherein the method includes the following steps: generating zero gas, and acquiring a pure spectrum; generating composite reference gas, and acquiring and calculating a reference spectrum; controlling a flow path of real-time process sampling gas, and acquiring and calculating a process spectrum; comparing the process spectrum with the reference spectrum, and calculating to obtain the concentration of a target analyte. Through new technical design scheme, the method and device can be applied to completely different backgrounds, and a saturation effect is not caused as long as the spectra of the sampling gas and the composite reference gas are in a linear response region of an electronic device; the device does not need pre-calibration before leaving a factory, moreover, does not need to store reference curves for the process sampling gas and the calibration gas according to different groups, and of course, also does not need to adopt different reference curves in the process sampling measurement and calibration measurement; and a built-in standard gas source is adopted for real-time self calibration.

Description

(1) Technical field [0001] The invention relates to a spectrum analyzer, in particular to a design method and device for a self-calibrating analyzer. (2) Background technology [0002] Analytical instruments based on absorption spectroscopy technology are realized by measuring the light absorption of a specific wavelength band of the target analyte. The frequency and spectrum type of the absorption spectrum are determined by the state of the initial and final vibrational rotation energy levels participating in the transition. Absorption spectroscopy based on semiconductor lasers has technical advantages such as high sensitivity and rapid measurement, and is often used for the detection of trace impurities in ppm or even ppb levels. In these applications, the background gas dominates both in volume and mass. When the temperature and pressure of the background gas change, the lifetime and center frequency of excited molecules (or atoms) will change, which will lead to change...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N21/31
Inventor 季文海耿艳峰
Owner CHINA UNIV OF PETROLEUM (EAST CHINA)
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